继承自ViewPager的支持多页显示GridView的自定义控件代码

package com.zt.test.widget; import java.util.ArrayList; import android.content.Context; import android.support.v4.view.PagerAdapter; import android.support.v4.view.ViewPager; import android.view.View; import android.view.ViewGroup; public abstract class AbsMyPagerAdapter extends PagerAdapter{ public static final int NUM_PER_PAGE = 9; // private LayoutInflater mLayoutInflater; //mPageTotal 是从1开始的，第一页时mPageTotal=1; private int mPageTotal = 0; //mViewTotal是保存container所加的页的数量 private int mViewTotal = 0; // mCurPage只由这里来控制被改变，从0 开始 private int mCurPage = 0; private View mContainerView = null; private Context mContext = null; private ArrayList<?> mDataList; private ArrayList<MyGridView> mGridViewList; private IOnItemClickListener mIOnItemClickListener = null; public static final String TAG = "AbsMyPagerAdapter"; public AbsMyPagerAdapter(Context context, ArrayList<?> list, IOnItemClickListener listener) { mContext = context; mDataList = list; mIOnItemClickListener = listener; Print.d(TAG, "######## AbsMyPagerAdapter #########"); mGridViewList = new ArrayList<MyGridView>(); } private IOnPageNotExistedListener mIOnPageNotExistedListener = null; public void setOnPageNotExistedListener(IOnPageNotExistedListener l) { mIOnPageNotExistedListener = l; } @Override public int getCount() { // TODO Auto-generated method stub Print.d(TAG, "AAAAAA // getCount() //mPageTotal = " + mPageTotal); this.mPageTotal = getGridViewPos(mDataList.size()); return this.mPageTotal; } @Override public boolean isViewFromObject(View arg0, Object arg1) { // TODO Auto-generated method stub return arg0 == ((View)arg1); } /** * 只保存当前两个View缓存，其他的会删掉 * 比如，翻到第三页的时候，第一页就开始删掉了 */ @Override public void destroyItem(ViewGroup container, int position, Object object) { // TODO Auto-generated method stub Print.d(TAG, "AAAAAA // destroyItem()"); Print.d(TAG, "+++++ destroyItem ++++++ container = " + container); // container.removeViewInLayout((View)object); // if(mRoomList.size() < (mPageTotal - 1) * (NUM_PER_PAGE)) { // mGridViewList.remove(mGridViewList.size() - 1); // Print.d(TAG, "+++++ destroyItem ++++++"); // } } @Override public Object instantiateItem(View container, int position) { // TODO Auto-generated method stub mContainerView = container; Print.w(TAG, "instantiateItem mGridViewList.size = " + mGridViewList.size() + "//position = " + position); Print.d(TAG, "container = " + container); MyGridView mgv; if(position >= this.mGridViewList.size()) { mViewTotal++; Print.d(TAG, "load....."); Print.d(TAG, "here position = " + position); // mgv = new MyGridView(mContext, mRoomList, mIOnItemClickListener, position * NUM_PER_PAGE); mgv = getView(mDataList, position * NUM_PER_PAGE); mGridViewList.add(mgv); mgv.getViewParent().setTag(mViewTotal); // container.findViewWithTag(tag); ((ViewPager) container).addView(mgv.getViewParent()); return mgv.getViewParent(); } else { Print.d(TAG, "Not load..... position = " + position + "#mGridViewList.size = " +mGridViewList.size()); mGridViewList.get(position).getAbsMyGridViewAdapter().notifyDataSetChanged(); return mGridViewList.get(position).getViewParent(); } } /** * Abstract. 用户根据布局自己生成一个MyGridView。 * @param position * @return */ public abstract MyGridView getView(ArrayList<?> dataList, int position); /** * See IOnPageNotExistedListener */ private void moveToLastPage() { Print.d(TAG, "MoveToLastPage() // ###############"); if(mIOnPageNotExistedListener != null) { mIOnPageNotExistedListener.moveToLastPage(); } } /** * 绕过Adapter自己手动改变GridView,用于手动翻页的时候改变所翻到的页的所有重绘。 * @param pos from 1 to mGridViewList.size */ public void notifyGridViewChange(final int curPage) { Print.w(TAG, "notifyGridViewChange() // curPage = " + curPage); mCurPage = curPage; if(curPage < mGridViewList.size() && curPage > 0) { mGridViewList.get(curPage).getAbsMyGridViewAdapter().notifyDataSetChanged(); } else { Print.e(TAG, "notifyGridViewChange() // curPage = " + curPage); } } /** * 数据更新当前页所在的某一项 * @param index index是其在mDataList中的位置， from 0 to (mDataList.size() - 1) */ public void notifyDataListChangePos(int index) { Print.w(TAG, "notifyDataListChangePos() // index =10 " + index + "// mDataList.size =11 " + mDataList.size()); if(index < 0 || index > mDataList.size()) { Print.e(TAG, "error index = " + index + " // mDataList.size = " + mDataList.size()); return; } int gridViewIndex = getGridViewPos(index); Print.d(TAG, "notifyDataListChangePos() // gridViewIndex =2 " + gridViewIndex); if(gridViewIndex <= mCurPage + 1) { mGridViewList.get(gridViewIndex - 1).getAbsMyGridViewAdapter().notifyDataSetChanged(index); } } /** * 只要是index在当前页或之前，我们就必须刷新当前页的整个gridView!!不然用户点击所选中的item将与所看到的item情况不一致。 * 当数据某一项被删除时，有三种情况， * 第一种index < 此gridview的startpos,不刷新，需要刷新，不然用户点击了item之后，与所看到的item数据不一致 * 第二种index >= 此gridView的startpos && index < 下一个gridview的startpos,目前是刷新整个gridview,后期优化可以只刷新当前gridview的index以后的几项 * 第三种index >= 下一个gridview的startpos，不刷新 * @param index dataList index */ public void notifyDataListRemovePos(int index) { if(mCurPage > 0) { int curPageStart = mCurPage * 9; if(curPageStart > mDataList.size() - 1) { Print.d(TAG, "notifyDataListRemovePos() // index = " + index); moveToLastPage(); } Print.d(TAG, "notifyDataListRemovePos() // curPageStart = " + curPageStart + " // mDataList.size = " + mDataList.size()); } int gridViewIndex = getGridViewPos(index); Print.d(TAG, "notifyDataListRemovePos() // mGridViewList.size = " + mGridViewList.size() + " // mCurPage = " + mCurPage + " // gridViewIndex = " +gridViewIndex + " // index = " + index + "// mDataList.size = " + mDataList.size()); if(index < 0) { Print.e(TAG, "notifyDataListRemovePos() here 1"); return; } if(mCurPage + 1 > mGridViewList.size()) { Print.e(TAG, "notifyDataListRemovePos() here 2. I don't know how to process it!!!"); } if(gridViewIndex > mGridViewList.size()) { Print.e(TAG, "notifyDataListRemovePos() here 3"); } else if(gridViewIndex <= mCurPage + 1) { Print.d(TAG, "notifyDataListRemovePos() here 4"); mGridViewList.get(mCurPage).getAbsMyGridViewAdapter().notifyDataSetChanged(); } else { // mGridViewList.get(gridViewIndex - 1).getAbsMyGridViewAdapter().notifyDataSetChanged(); Print.e(TAG, "notifyDataListRemovePos() here 6"); } } private int getGridViewPos(int index) { return (index % NUM_PER_PAGE) >= 0 ? (index / NUM_PER_PAGE + 1) : (index / NUM_PER_PAGE); } /** * 方法返回none没效果 */ @Override public int getItemPosition(Object object) { Print.d(TAG, "getItemPosition "); Print.d(TAG, "AAAAAA // getItemPosition()"); int position = super.getItemPosition(object); return position; } }